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Physics

Describe an experiment to determine the density of a liquid.

Measurements

ICSE

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Answer

The density of a liquid is determined by first finding its mass and then its volume.

  1. Take an empty beaker and measure its mass by using a common beam balance. Let the mass be M1 g.
  2. Take some amount of liquid and pour it into the empty beaker. Measure its mass again. Let it be M2 g.
  3. The difference between M2 and M1 gives the mass(M) of the liquid. M = M2 - M1.
  4. Pour the liquid from beaker into a measuring cylinder. Note the volume of the liquid. Let it be V mL or V g cm-3.
  5. Calculate the density of the liquid using the following formula:

Density=MassVolume\text{Density} = \dfrac{\text{Mass}}{\text{Volume}}

D=MV g cm3\text{D} = \dfrac{\text{M}}{\text{V}}{\text{ g cm}^{-3}}

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